Centrifugal separator for ores.



0. o y a M d e t n e t a DI F. El 0 L S A A R E D H. A, 8 4 6 0. N

CENTBIFUGAL SEPARATOR FOR GRES.

(Application led Jan. 18, 1900,)

3 Sheets-Sheet I.

(M Model.)

INVENTR v'q ATTORNEY Patented May I, |900.

H. DEBAASLFF. CENTRIFUGAL SEPARATGR FOR GRES..

(Application led Jan. 1B, 1900.)

3 Sheets-Sheet 2,

(No Model.)

INVENTOR L l BY` M ATTORNEY nw 0 y a M d e t n e t a P h F o L s A A DnE D H. n? 8 4 6 0. N

CENTRIFUGAL SEPARATOR FOR DRES.

(Applicatiop filed Jan. 18, 1900.)

3 Sheets-Sheet 3A.

(No Model.)

ATTO RN EY UNITED STATES PATENT OFFICE..

HARALD DE. RAASLOFF, OF NEW YORK, N. Y.

vCENTRIFUGAL SEPARATOR FOR ORES.-

SPECIFICATION forming pertof Letters retentwno, 648,711, dated may 1,1900.

Appncaon mea Jimmy 18. 1900. seau no. 1,335. (No man.)

' a citizen of the United States, residing at the borough of Manhattan,in the city of New 5 York, county and State of New York,.have inventedcertain new and useful Improvements in Centrifugal Separators for Orcs,of which the following is a specification.

This invention relates to improvements in centrifugal separators forores, and especially such as are used for separating the solutionscontaining precious minerals from base mineral earthy matter.. Inparticular it relates' to improvements in centrifugal separators for usein the continuous process of separating precious metals from theiroreswhich are described and claimed in my application for Letters Patentof the United States filed January 18, 1900, Serial No. 1,836.l f

The purpose of the 'invention is to'produce a centrifugal separatorwherein there will be a grad ual concentration of the base solid mattersas those matters pass-from the inlet to the point of discharge and alsowherein the at will by the operator. To this end the device is soconstructed as to cause the base matters to separate from the solutionand to iiy toward the shell of the filter in such direcbe a resultant ofthe centrifugal force sub stantially parallel to the shell, whichresultant shall be sufficient to overcome the adhesion and friction ofthe base matters on the shell and move the said base matters to theirpoint of discharge, and the shell is so shaped as to increase thisresultant as the base matters concentrate and become denser, so that eryof the separator, while the solution, being 45 of less specific gravity,is drawn olf through separate orifices nearer the center of the filter.

Referring to the drawings which accompany the specification to aid thedescription, Figure 1 is an elevation of the centrifugal separator thedeflector and blades. l Fig. 2 is a top view of the same. Fig..3 isa-transverse section projected vertically on the plane of the line 33'of Fig. 2 of the lower part-of 'the shell,

degree of such concentration can be controlled tion with respect to saidshell that there shall with one-half of the shell broken away to showshowing the pockets and discharge-outlets, the valves being removed.Fig. 4. is a sectional elevation of a modification `wherein the filteris arranged with the large end up, Fig. 5 being a horizontal sectionmidway of the .height of Fig. 4. In that form of the device shown inFigs.

1 to 3, inclusive, 1 is a stationary hood fastened in any suitablemanner to a stationary support, 2 being the inletpipe,which delivers,

the pulpz. e., the mixed base matters and solution containing thedissolved precious minerals, especially gold-into said hood 1. Forconvenience said hood is preferably made in two parts flanged together,as shown. The double-danged collar 4 is fastened on the neck 6 of thefilter-shell, fits loosely over said hoodv 1, and turns in the bushing5, which is fixed.'I

to any suitable hangers or supports 7. The

shell of ythe centrifugal separator is prefereral sections, the flare ofthe lower being greater than that of the upper sections, as shown, sothat the increase of the resultant of the centrifugal force parallel tothe slope shall compensate for the increasing density of theconcentrating base-matters sludge as the sludge approaches the point ofdischarge, and so keep the sludge moving along the shell. Said bottom 12has the downwardly-curved flange 11 positioned a short distance withinand concentric to the rim 13 of the shell and is provided with pocketsl,at the bottom of each of which are the'outlets 14, controlled by thevalves v18 in the manner hereinafter described. An axial 4'spindle 2Oextends through and some distance above and below the shell and ispreferably made of strong tubingwith studs 22 23, which turn in bearrooA deflector compris- IOSv of-the shell. Blades 36, arranged midway ofthe outlets 14, are fastened to said arms 32 to cause the pulp torevolve at the same velocity as the shell. rectilinearly in guides 19and is shifted by the connecting-rod 40, which is pivotally connected atits inner end with the bent lever 41, pivoted at 43 iny hangers45, whichare fixed under the plate 12. The other end of each said bent lever 41is connected by links 47 with the flange 48 ofthe collar 49, which workson the sleeve 50. A lever 52, pivoted at 53, engages said collar 49inthe usual manner and by raising said collar closes said valves, whilethe lowering of said leverand collar opens the valves.

A stationary annular trough 55 is posif tioned to receive' the dischargefrom the outf lets 14,-and said trough delivers* the waste valves60,'open-.throughftlrbottom 1.2fsaiidlz pipes 2585 discharging into"'the'anular" trough matters into any suitable receptacle.

Intermediatethe periphery'of the frustumy -and the dellector 28 pipes58, controlled by G1,- fromwhich the-solution is drawn or flowscontinuously to bel treated in the succeeding" steps of the process. Thevalve-rods 62 are pivotally connected at their inner 'endswith one armof the bent levers G4, which arepivoted at 65 to the said hangers 45.The other arm of said levers 64 has a slot-andpin connection with saidsleeve 50, ywhich is feathered to slide on the spindle 20 or the sleeveG7 of the plate 12,` as convenience dictates. A collar 69, xed on sleeve50, is engaged in the usual manner with the lever 70, which is pivotedat 71, so that by raising said lever 70 all the valves are closed and bylowering said lever all said valves are opened.

The construction hereinbefore described permits of readily opening andclosing the valves 18 60 when the device is revolving and withoutinterferingwith the continuity of the process.

The operation is as follows: The pulp entering from pipe 2 and fallingthrough hood 1 into the pulp which fills the filter to a point justbelow the hood reaches the cylinder 9 at a point sufficiently out fromthe center to be energetically acted on by the centrifugal force, theblades 36 immediately imparting to the pulp the same velocity ofrotation as the shell has. The separation of the base matters begins atonce, and said cylinder 9 is preferably of such length that said basematters shall j ust begin to concentrate on the shell when they reachthe upper end of the frustum 10.l Now the resultant of the centrifugalforce, which is parallel to the slope Each of said valves 18 works thecentrifugal separator intothe trough 55. As soon as the valves 18 areinally opened valves 60 are also opened, and the solution containing thedissolved gold separated from the base ymatters flows continuously intothe trough 61 and goes thence through the other steps of thcprocess,returning when recharged again and again to-theseparator-ilter, asdescribed in my other application.

Referring to the modification shown in Figs. 4 and 5, the delivery-pipe7 3 discharges into` the funnel-pipe 75, which is extended downward tonear the lower end of the shell of the centrifugal separator, as shown.An innerl pipe 90, with a funnel end, which lits water-*tight in thepipe 75, discharges the pulp near the bottom of the shell=110. Saidshell 110 is arranged with thelarge' endup and is formed on anoutwardly-concave liiare or in sections,fea'ch^f Alwlii'chlias agrealteroutward are than the-'liext flower sectitm".` The point o't'fdischargeofthe solid matters is now at the lconstruct'ed that there shall be anincreasing resultant ofthe centrifugal `force parallel to ,the slope ofthe shell to compensate for the greater density and adhesiveness andfriction of the solid matters as they move toward the point ofdischarge. Also in both forms of the apparatus the pulp enters one endof the shell and thesolid matters ldischarge at the other end, so thatthe movement of the solid matters is not interfered with by the mainflow of the pulp in the apparatus, being in the opposite direction, asit would be if the pulp entered the shell at the end where the sludgewasdiseharged. The ribbed coverplate 111 of said shell has oriiices 113,controlled by valves 115, reciprocating between the plate 111 and theguide-liangcs 117 of the nozzles 118, said nozzles discharging into theannular trough or vessel 120, whence the sludge is drawn into anysuitable receptacle. Said valves 117 are connected by rods 84 with oneend of the bent levers S2, which are pivoted at S3 in brackets carriedby plate 111. The other ends of said levers 82 are pivotally connectedwith the collar 76, which slides on pipe 75. A lever 77, pivoted'at78'in the bracket 80, engages said collar 76 in the usual manner, sothat by raising said lever the valves 117 are opened and by lowering itsaid valves are closed. Said bracket 80 may be carried by the bushing72, which constitutes a bearing for the pipe 75 and is supported bysuitable hangers 74. A deflector 92, provided with an 'open grid top ofangle-irons 91, bent vinward at 93 and outward and upward at 94, so asto be fastened to the pipe 75 and plate 111, fits tight against saidpipe 75 at its lower endand is firmly fastened to said pipe. Just lbelowthe bottom of said deflector, but above the bottomlof the shell 110,said pipe 75 connects with cross-tubes 96,'which terminate in nozzles97, that de- ICO IIO

liver. thesolntion into the annular vessel 98,

, whenceit flows by pipes 99 to be'treated 75 below the'level which thepulp assumes orifices 102 are made into'said pipe and the metal of saidpipe bent to form tongues. 103,

as shown. As the shell revolvesin the direction of the arrow, Fig. 5,said tongues 103 force the solution into pipe 7 5, whence it iiows bytubes 96, as before stated. A spindle 105,

fixed to' the bottom of the shell 110, is revolved in any suitablemanner, as by the electric motor 106. A bushing 107, carried by thestandard of the motor, serves as a guide-bearing for said spindle 105,the armature of the motor or the spindle being' stepped in a block 108.

The operation is as follows: The pulp, flowing into the pipe 75, isdischarged into the bottom of the centrifugalseparator and then flowsoutwardly and upwardly, being re volved by the blade's'100. The basesolid matters now begin to separate and concentrate on the shell, theincreasing resultant ofthe centrifugal force parallel to the slope ofthe shell moving said matters to the point of discharge.

4When the proper degree of concentration of the sludge is attained, thevalves 117 areopened and left openand the solid matters flowcontinuously from the centrifugal. separator into. the vessel 120.Meantime the lighter solution, containing the dissolved gold, enters theopen top of thev deflector 92, this open top being at about theestimated level ofthe pulp, and the solution flowing from the deflectorinto the pipe 75 by the orifices 102 finally issues in a continuousstream from the nozzles 97. Should the operator cease to add pulp,thelevel in the deflector 92 will fall just below the orifices 102 and thedischarge of the tion of a shell, au inlet at one end and anoutifsolution will cease.v vThe solid matters, how- `ever,lwill continueto be discharged as long as anyseparation bythese means is possible. 35

s shell 110 as a cylinder similar to the upper. .part of the shell inFig. l; butthe cylinder is Ynot essential in either case.

I can of course form the 'lower part of the Now, having described myimprovements, I claim as my inventionl 1. Ina centrifugal separatorthe-combinalet at the other end of such shell for solid mat-- .ters, andsaid shell being formed with an increasing outward iare toward the saidoutlet, whereby the resultant of the centrifugal f ,for-'ce parallel tesaid shell is progressively increased' toward said outlet, substantiallyas described.

.2.7 In a centrifugal separator, the combination of a shell having aprogressively-increas- -"ing voutward iiarel toward'the point` of disendand an outlet for the solid matters at the other end of said shell, adeiiector in said shell, blades between said deflector and said shell,and outlets for the liquids separate from the outlets for said solidmatters, substantially as described.

4. The combination in a centrifugal separator,of a shellhaving aprogressively-increasing outward dare toward the point of discharge, auinlet at one end and a discharge 'for the solid matters at the otherend, valves controlling the discharge of said solid matters, and a leveroperatively connected with said val ves by a rotatable connectionwhereby the lever can throw the valves when the shell is revolving,substantially as described.

5. The combination in a centrifugal separator of a shell formed with anincreasing outward flare from the inlet to the discharge for the solidmatters, and'a deiector in said shell, adapted to direct the incomingmatter out from the center of rotation, substantially as described. I

6. The combination in a centrifugal separator of a shell'formed with anincreasing outward dare from the inlet to the discharge for the 'solidmatters, a deflector to said shell and blades between said defiector andshell, substantially as described.

7. The combination in a centrifugal separator, of a shell provided withan inlet at one end and with a discharge vfor the solid matters at theother end of said shell, and said shell formed with an increasingoutward are toward said discharge, a separate discharge `for theliquids, independent'valves control- I ling said discharges, andindependent means for actuating said valves having rotatable connectionwith their several valves,whereby the valves may be actuated when theshell is revolving, substantially as described.

8. In a centrifugal separator, a shell provided with an inlet andoutlet, and said shell 'being formed with an increasing outward flaretoward said outlet, whereby the resultant of the centrifugal forceparallel to said shell is progressively increased toward said outlet,substantially as described.

In testimony Awhereof I have signedmy IIO name hereto, this 17th day ofJanuary, 1900,

at'New York, N. Y. in the presence of two witnesses. l

HARALD DE RAASLOFF.

Wit/nesses:

' HENRY V. BROWN,

ABM. VAN SANTvooRD.

